Metal chip crusher



Aug 12,1952 P. K. MOSER METAL CHIP CRUSHER Filed July 24, 1950 IN VEN TOR. P1901 K416i MOSafE RTTOIE/V) Patented Aug. 12, 195';

META-Loni? CRUSHER V g Paul KarlMosenBuderich, near Dusseldorf, Ger-'- many,

Dusseldorfi; Germany 7 Application July. 24, 1950, Serial No. 175,583 InGerma y May 2, 1950 The invention relates to beater mills and crushers for use in the disintegration of hard materials. I

Crushers of this type are oftenv provided with hammers which are solidly. or swingably attached to rotors or beater crosses and coact with an impact nose provided in the housing of the crusher or beater mill.

If these known crushers are applied to the] dis integration of metal chips the great inconvenience arises that the resilient chip bundles become entangled with the beaters of hammers;

rotors and swing into eccentric positions relative to the bolts and causing in cooperation with an impact nose a disintegratingyaction of the materials fed into the crusher. These rings indeed avoid to a certain degree the disadvantage of becoming entangled with the resilient and bulky chip' bundles; however, their working energy is greatly inferior to those of hammers of equal weight, because the distance of mass concentration of the rings, from. the bolts about which they oscillate is small.

It is the main object of this invention to eliminatewthese disadvantages of the hitherto customary crusher'rin s. V v

It is another object of the invention to increase the disintegrative efficiency of the crushers.

It is also an object of the invention to entirely eliminate work stoppages and interruptions caused by the entanglement of the crusher rings with bulky and resilient scrap bundles.

It is another object of the invention to provide a metal scrap crusher having a simple and cheap construction and nevertheless an extremely high crushing efliciency.

With these and other objects in view which will become apparent as this specification proceeds the invention will now be described with reference to the accompanying drawing illustrating a preferred embodiment thereof.

In the drawing:

Fig. 1 is a schematical vertical cross section of l Claim. (Cl. 241-36,)

assignor to Waldemar Lindema'nn;

2 ametal chip crusher constructed in conformity with my invention and Fig. 2 is a perspective view of a crusher or beaterring usedin connection therewith.

Fig. 3 is a side view of a crusher or beater'ri'ng with the importantsizes dimensioned.

The crusher forming the subject matter of my invention comprises a housing composed of walls I!) and encasing an inner crushing space. An annular plate I, is mounted on av shaft l2 in the center of the housing. Horizontal pins Tare fastened to the circumferential portion of rotor or plate I. An equal number of'annular beaters or crusherrings 3, 4, 5, 6 are supported on these bolts 2 for free oscillation; the inner, bores 33 4, 5', 6 of these .beaters have'a considerably larger diameter thanthe bolts 2; the diameter of the inner bores 3-6' may preferably be about twice the size or more of the diameter of the pins or bolts 2.

These inner bores are, in conformity with the invention, eccentrically located relative to the center of the disc-shaped beaters 36'; accordingly, a very high mass concentrationwill result at certain partsof their circumference'during the rotation of the rotor I.

As soon as the center shaft I2 is set into rotation the beater rings 3--6 will freely rotate and oscillate about their pivots 2 and, of course, assume a variety of operative positions. Due to thegreat distance of the thus produced mass concentration of the rings from the center of bolts 2 an effective hammer action is exerted by the beaters 36 onto the chips fed through feed opening [4 into the gap 1 between rotor or annularplate I and the walls ID of the crusher.

In conformity with Fig. 1 beater 3 is outwardly swung into the cooperative position with impact nose 9 Beater 4 evades operative contact with the chips by inward rotation about bolt 2. Beater 5 has been radially pushed back, its operative portion being still outwardly directed; beater 6 is turned about relative to beater 3 whereby the annular gap 1 between the beater rings and the walls of the crusher is fully freed.

An important item to improve the efliciency of the instant crusher is the difference in size between the diameter D of the grinder disc beaters 3, 4, 5, B and the diameter D2 of the recesses or passages 3, 4, 5, and 6'; the diameters D2 of the recesses are at least equal to one-half of the diameter D of the grinder disc beaters.

In this manner, a free rotation of the beater discs about the bolts 2 is created resulting in an 3 intense beater action which is increased by the large radial distance travelled by the beater discs during the rotation of the annular plate I.

The highly efiicient disintegrating action exerted by the beaters and the elimination of entanglement with the chips results from their eccentric location on pins 2; during the rotation of the rotor l the beater rings 3-6 are outwardly thrown with a terrific force and hammer the chips fed from chute [4 into the annular gap 1 against the nose 9. On the other hand, and .due to their eccentric location, the rings 3-6 can easily evade obstructions and assume any desirable position to avoid entanglement. In order to increase the efficiency of the crusher the beater rings 36 may be provided at the operafree swinging about its bolt 2 in all angular directions during turning of the annular plate I. The bolts 2 are spaced on said annular plate I for a certain distance and the outside diameter D of the beaters is so dimensioned, that there is excluded the possibility of physical contact between the beaters in any position.

The invention has been described with reference to a preferred embodiment and it will be understood that many variations and modifications thereof may be resorted to without departure from the scope of the invention as defined in I the following claim.

i a horizontal axis, a series of bolts horizontally tive portion of their circumference or the part where their greatest mass is concentrated with outwardly directed bulges or with teeth H which tear the chips to pieces. The teeth Il may be sharpened to further raise their disintegrating action.

A grate 8 is provided underneath rotor l which completes the disintegration by its rubbing eifect exerted onto the chips. The great disadvantage of the customary chip beaters is that the chips are clogged during their passage through the gap 1 between the grate and the beater rings; this clogging action is here avoided.

This disadvantage is eliminated by the large size of the eccentric bores 3'6 whereby the beaters may easily yield towards the direction of smallest resistance. If the beaters are hereby inwardly turned with their operative side, whereby their teeth ll point towards shaft 12, every danger of entanglement is eliminated as the beater rings 3-6 slide with their smooth thin portion along or over the chipswhereby the gap 1 is kept free between the rotor l and grate 8.

As pointed out in the foregoing, each of the beaters 3, 4, 5 and 6 is suspended from a bolt 2; and each bolt 2' extends horizontally from the annular plate rotor I that turns about a horizontal axis; each'beater has a cylindrical contour, and several grooves arerecessed in a portion of said cylindrical contour and spaced from each other toform in each beatera series of teeth H capable of striking against the grate member 8. .Each of the cylindrical recesses, bores or passages 3, 4', 5' and 6' is oifset in its beater 3, 4, 5, or 6, respectively, excentrically from the beater axis and oppositely with respect to the row of teeth I I thereof. Themiddle tooth in the tooth-carrying portion of each beater is so positioned that it is bisected by a geometric line passing through the axis of the beater and the passage therein; the diameter D2 of said passage is considerably larger than the diameter of a bolt 2, so that each beater can engagein a extending from a peripheral portion of said rotor, and a grate member below said rotor, in combination with, a series of beaters, one suspended from each bolt, and each beater having a cylindrical contour and a series of spacedgrooves recessed in a portion of said contour to form therein teeth arranged to strike against said grate member, and having a cylindrical passage offset eccentrically from the beater axis oppositely of said teeth, the middle tooth in said portion being bisected by a line passing through the axis of the beater and of said passage, the diameter of said passage being considerably larger than the diameter of a belt for free swinging movement about the same in all angular directions during rotor turning and being at least equal to one-half of the diameter of the beater cylinder, whereby the major part of the mass of said beater is concentrated near said teeth for increased striking impact thereof, said bolts being spaced on said rotor for a'distance sufficient, and the outside diameter of said beaters being so dimensioned, as to obviate physical contact between said beaters in any position.

. PAUL KARL MOSER.

REFERENCES CITED The following references are of record in the file of this patent:

UNITED STATES PATENTS 

